JPH0715285A - Radio receiver - Google Patents

Abstract

PURPOSE:To display the name of a broadcasting station corresponding to a preset button when the preset button is operated, and to tune the broadcasting station of which station name is displayed. CONSTITUTION:A controller 10 stores the reception frequency data of stations belonging to a broadcasting station identification code, broadcasting name code and broadcasting station identification code corresponding to the plural preset buttons provided at a tuning part 11 and when any preset button at the tuning part 11 is operated, the broadcasting station name corresponding to the operated preset button is displayed on a display part 12. Afterwards, the designated station is tuned by controlling a PLL synthesizer 4 so as to tune the broadcasting station corresponding to the operated preset button.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a radio receiver,
In particular, the present invention relates to a radio receiver suitable for use in a radio data system (RDS) put to practical use in Europe.

[0002]

2. Description of the Related Art A radio data system put to practical use in Europe is known as a system for multiplex broadcasting various data to FM broadcasting. As various data used in this system, a broadcasting station identification code (PI) is used. Code), alternative frequency list (AF) for the same network,
There is a broadcasting station name code (PS), etc. The radio receiver for RDS has an antenna for receiving FM multiplex broadcasting, a front end for selecting a desired station from the broadcasting received by the antenna and converting it to an intermediate frequency, an IF amplifier for amplifying an IF signal, and an IF signal. FM detection circuit for detecting the, the demodulation circuit for demodulating the detection output into left and right stereo signals, the filter for extracting the radio data signal from the detection output of the FM detection circuit, the demodulation circuit for demodulating the output of the filter, the output of the demodulation circuit A decoder that decodes the data, a controller that controls the PLL synthesizer based on the radio data and a display device unit, a channel selection unit that controls the controller according to signals according to the operation of a plurality of preset buttons, and the like are configured. There is.

FIG. 6 shows various data stored in the memory in the controller. In this memory, the reception frequency f _{00 of} the currently received broadcast, the broadcast station identification code (PI code) PI _{0 of} the currently received broadcast, and the alternative frequency list (AF of the same network as the currently received broadcast) (AF
List) f ₀₁ , f ₀₂ , f ₀₃ , f ₀₄ ..., Broadcasting station name code (PS) of the broadcast currently being received, PI code of another network and AF list (PI ₁ , f ₁₀ , f ₁₁ f ₁₂ f ₁₂ f ₁₃ f
₁₄ ...), (PI ₂ , f ₂₀ f ₂₁ f ₂₂ f ₂₃ f ₂₄ ...), and auto preset data (PI code, reception level, AF list) and the like are stored corresponding to each preset button.

Next, the operation of calling the data stored in the memory (preset calling) corresponding to the conventional preset button will be described. First, while receiving the frequency f ₀₀ , the preset button is operated to select the station having the highest reception level among the plurality of stations having the same broadcast station identification code stored in the memory. After this channel selection, the RDS data is decoded, the PI code is checked, and it is confirmed that the decoded PI and the stored PI match. Then, as soon as all 8-digit PS is decoded, the broadcast station name code is followed. The broadcasting station name is displayed.

[0005]

However, in the above conventional radio receiver for RDS, when the preset calling operation is performed by operating the preset button, when the preset button is pressed, the last reception frequency at the time of the previous preset reception is set. It is supposed to be displayed, which PS
Remember the preset station, or wait until the radio receiver selects the station with the highest reception level, then listen to the broadcast content of the tuned station to determine the station, or display it. There is no choice but to wait for the broadcast station name
There is a problem that it is not easy to use.

The present invention solves the above conventional problems and provides a radio receiver capable of displaying a broadcasting station name according to the operation of a preset button and selecting this broadcasting station. The purpose is to do.

[0007]

In order to achieve the above object, the present invention provides a broadcasting station identification code, a broadcasting station name code, and a station belonging to this broadcasting station identification code corresponding to a plurality of preset buttons. Storage means for storing reception frequency data of at least one receivable station, and a broadcasting station name code corresponding to each preset button is extracted from the storage means in response to operation of each preset button, and broadcasting according to this code is performed. Display means for displaying the station name, determining means for determining whether or not the broadcast station identification code of the received signal and the broadcast station identification code of the broadcast station displayed on the display means match, and affirmative determination by the determining means When the result is obtained, the radio receiver is configured to include a tuning unit that selects a reception frequency data station corresponding to the operated preset button.

[0008]

The present invention has the above-described structure, and when an arbitrary preset button in the preset button group is operated, the broadcasting station name code corresponding to this preset button is extracted from the storage means and stored in this code. The name of the station that followed is displayed. After that, a station that matches the displayed broadcast station identification code of the broadcast station name is selected.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a radio receiver for RDS. In FIG. 1, the radio receiver includes an antenna 1, a front end 2, an IF amplifier, a PLL synthesizer 4,
The FM detection circuit 5, the demodulation circuit 6, the filter 7, the demodulation circuit 8, the decoder 9, the controller 10, the channel selection unit 11, and the vice unit 12 for display.

The antenna 1 receives the FM multiplex broadcast and inputs the received signal to the front end 2. The front end 2 selects a desired station among the stations received by the antenna 1 according to the PLL synthesizer 4, converts the frequency of the selected station into an intermediate frequency (IF), and outputs an IF signal to the IF amplifier 4. It is like this. The IF amplifier 3 amplifies the IF signal from the front end and outputs the amplified signal to the FM detection circuit 5. The FM detection circuit 5 detects the IF signal and outputs the detected signal to the demodulation circuit 6 and the filter 7. The demodulation circuit 6 separates the detected signal into left and right stereo signals. The filter 7 extracts the radio data signal from the detection output of the FM detection circuit 5, and outputs the extracted signal to the demodulation circuit 8. The demodulation circuit 8 demodulates the radio data signal and outputs the demodulated signal to the decoder 9. The decoder 9 decodes the signal from the demodulation circuit 8, generates radio data, and outputs the generated radio data to the controller 10. The IF signal from the IF amplifier 3 is input to the controller 10,
Determines the level of the received signal according to the IF signal, and performs various controls such as display control of the display device unit 12 according to the determination result and radio data. Further, the controller 10 responds to operation signals from a plurality of preset buttons provided in the channel selection unit 11 so as to tune to a predetermined frequency based on the reception frequency related data stored in memory corresponding to each preset button. Further, the frequency division ratio data is set in the variable frequency divider of the PLL synthesizer 4. The PLL synthesizer 4 has a built-in program frequency divider, and when the frequency division ratio data set in the program frequency divider is changed, a desired station is selected according to the frequency division ratio data. ing.

FIG. 2 shows various data stored in the memory in the controller 10. In this memory, the reception frequency f _{00 of} the currently received broadcast, the broadcast station identification code (PI code) PI _{0 of} the currently received broadcast, and the alternative frequency list (AF) of the same network as the currently received broadcast
List) f, ₀₁ , f ₀₂ , f _{03 ,,} f ₀₄ ..., PI codes of other networks and AF list (PI ₁ , f ₁₀ f ₁₁ f ₁₂ f ₁₃ f ₁₄
…), (PI ₂ , PS ₂ , f ₂₀ f ₂₁ f ₂₂ f ₂₃ f ₂₄ …), and response preset data (PI, PS, f _xx …) corresponding to each preset button. There is.
In order to store the PS in the preset, it is necessary to receive it once, decode the RDS data, and take in the PS data in 8 digits.

Next, the preset memory operation in the radio receiver of the above embodiment will be described with reference to FIG. FIG. 3 shows the operation of the auto preset memory in the controller 10.

First, in step A, the memory is cleared.
Next, in step B, the division ratio data corresponding to the lowest frequency (f _MIN ) in the band is set in the PLL synthesizer 4,
Start seek operation. In step C, whether the seek operation has completed one round, that is, the set frequency is the lowest frequency (f
_It is determined whether or not the frequency has been _increased from _MIN ) to the maximum frequency (f _MAX ). When it is determined in step R that the seek operation has completed one round, the auto memory operation is ended.

On the other hand, when it is determined in step C that the seek operation has not completed one round, the process proceeds to step D ,. It is determined whether or not the reception level of the frequency set in step B is equal to or higher than a predetermined value. If it is determined in step D that there is no receiving station, the process proceeds to step E, the received frequency is increased by a predetermined frequency, and the process returns to step C. Step A above,
Using B, C, D, E to increase the reception frequency from the minimum frequency (f _MIN ) to the maximum frequency (f _MAX ) in increments of a predetermined frequency, and search for a station whose reception level is a predetermined value (a level above which RDS data can be decoded) become. At this time, when the receiving frequency is set to f ₁ in FIG. 2 and it is determined that there is a receiving station in step D, the process proceeds to step F, and the PI code of the radio data obtained by receiving the receiving frequency f ₁ is checked. And check the reception level.

Next, in step G, it is judged whether or not the PI code is obtained. If the PI code is obtained here, the process proceeds to step H, and it is determined whether or not the PI code obtained in step G already exists in the preset memory shown in FIG. If "NO" is determined in this step H, the process proceeds to step L, and if "YES" is determined in step H, the process proceeds to step I, and the reception level detected in step F is already stored in the preset memory shown in FIG. It is determined whether or not the received level is higher than the stored reception level. If “NO” is determined in this step I, the process proceeds to step K, and if “YES” is determined, step J is performed.
Proceed to. In step J, the frequency f ₁ is written at the head of the predetermined memory area already stored in the preset memory, that is, the frequency memory area corresponding to the PI code obtained in step F, and is further stored in the preset memory. The received reception level is updated to the reception level detected in step F.

On the other hand, in step K, the reception frequency is written in the frequency memory area having the same PI code in the preset memory. At this time, at the same time, it is determined whether or not the decoded PS at this time and the stored PS match. And when they are different, the new PS is memorized. At this time, if the frequency memory is full and there is no writable memory area, frequency writing is not performed. Then, in step I, the frequency is written in the frequency memory area of the open channel (Ch) of the preset memory. If there is no open channel (Ch) in step I, the reception levels are compared and the reception frequency with the higher reception level is written. Thus, when the processing of steps J, K, and I is completed, the process proceeds to step M,
The rearrangement is performed so that the reception level written in the preset memory becomes higher. Then, when the sorting in step M is completed, the process returns to step E, the reception frequency is increased by one step, and thereafter, the same processing as described above is executed.

As described above, in the above embodiment, when there is a receivable station whose reception level is equal to or higher than the predetermined value while changing the reception frequency sequentially, the PI code and the reception frequency of the station are checked, The frequency of a station having the same PI code is stored in a preset memory corresponding to the same channel, and a station having a different PI code is assigned to each preset button. That is, as shown in FIG. 4, the data of the PI code corresponding to the preset button is stored in the preset memory as data. And the channel (Ch) corresponding to the preset button
1,2,3,4,5,6 different PI code (P
I ₁ ,-, PI ₂ , PI ₃ , PI ₄ ) are allocated, and the frequencies of stations having the same PI code are the same channel (Ch).
Is stored in the P channel corresponding to each channel (Ch).
Among the I-code stations, the frequency of the station having the highest reception level is stored at the head, and the highest level value is stored corresponding to each channel (Ch). For example,
4, channel 1 (preset buttons corresponding to 1) PI code (PI ₁₎ is assigned to, PI code (PI ₁₎ frequency f ₁ of the receivable stations of stations, f _2,
f ₄ corresponding to the channel value is stored, and is beginning to store the received frequency f _1, f _2, f of highest reception level is high station among the ₄ frequency (f _1), the level (l ₁₎ Is also stored in association with channel 1. Then, at this time, different PI codes (PI ₁ ,-, PI ₃ , P) allocated to the channels (Ch) 1, 2, 3, 4, 5, 6 corresponding to the preset buttons.
I ₂ and PI ₄ respectively, PS data (PS ₁ ,
−, PS ₃ , PS ₂ , PS ₄ ) are stored in association with each other.

FIG. 5 shows a process of selecting an auto-preset station. In FIG. 5, when a predetermined preset button is operated in step A, it is determined in step B whether or not PS is stored in the channel (Ch) corresponding to the operated preset button. If it is determined that the PS is stored in this step, the PS data is transferred to the display device unit 12 and the broadcasting station name is displayed. After that, the process proceeds to step C, and it is determined whether or not the PI code is stored in the memory. If it is determined that the PI code is stored in this step, the process proceeds to step C, the level of the stored frequency is determined, the upper four stations having high levels are selected, and the process proceeds to step D. In step D, the PI code of the station having the highest level among the selected upper four stations is checked, and the process proceeds to step E.

In step E, it is determined whether the PI code detected in step D matches the PI code stored in memory corresponding to the operated preset button. If it is determined in this step that they match each other, the process proceeds to step G, the process of tuning to the target frequency is performed, and the channel selection process ends.

On the other hand, if it is determined in step E that the PI codes do not match, it is determined in step F whether or not the comparison of the PI codes of the upper four stations selected in step C has been completed, and all When it is determined that the determination is finished, the process proceeds to step H, the process of tuning to the head frequency of the frequencies stored in correspondence with the operated preset button is performed, and the channel selection process is finished. Step F
If it is determined that the comparison of the PI codes of the upper 4 stations is not completed, the process returns to step D, the PI code of the next higher station is checked, and the same operation as described above is repeated thereafter. In step B, when it is determined that the PI code is not stored in the corresponding channel (Ch), the process proceeds to step H and the PLL synthesizer 4 is changed so as to tune to the head frequency stored in the memory. The frequency division ratio data is set in the frequency divider, and the process ends.

[0021]

As is apparent from the above embodiment, according to the present invention, when any preset button is operated, the broadcasting station name corresponding to the preset button is displayed, and then the designated station according to the operation of the preset button is displayed. It is possible to select a channel and contribute to improvement of operability.

[Brief description of drawings]

FIG. 1 is a block diagram of a radio receiver showing an embodiment of the present invention.

FIG. 2 is a configuration diagram of various data stored in a memory of the radio receiver of the present invention.

FIG. 3 is a flowchart for explaining a response preset operation of the radio receiver according to the present invention.

FIG. 4 is a configuration diagram showing a storage state by auto preset of a radio receiver according to the present invention.

FIG. 5 is a flowchart showing a tuning operation of the radio receiver according to the present invention.

FIG. 6 is a diagram showing a storage state by auto preset of a conventional radio receiver.

[Explanation of Codes] 1 Antenna 2 Front End 3 IF Amplifier 4 PLL Synthesizer 5 FM Detection Circuit 6 Demodulation Circuit 7 Filter 8 Demodulation Circuit 9 Decoder 10 Controller 11 Channel Selection Section 12 Display Section

Claims (1)

[Claims] 1. A storage means for storing a broadcast station identification code, a broadcast station name code, and reception frequency data of at least one receivable station among stations belonging to the broadcast station identification code corresponding to a plurality of preset buttons. In response to the operation of each preset button, a broadcasting station name code corresponding to each preset button is extracted from the storage means and a broadcasting station name according to this code is displayed, and a broadcasting station identification code of the received signal. And a judgment means for judging whether or not the broadcasting station identification code of the broadcasting station displayed on the display means is coincident with, and when the judgment means gives a positive judgment result, it corresponds to the preset button operated. A radio receiver having a tuning means for selecting a reception frequency data station.